Open AccessInteraction of p modes with a collection of thin magnetic tubes
Author(s) -
Jain R.,
Gascoyne A.,
Hindman B. W.
Publication year - 2011
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2011.18778.x
Subject(s) - physics , magnetohydrodynamics , flux tube , magnetohydrodynamic drive , magnetic flux , energy flux , flux (metallurgy) , plasma , absorption (acoustics) , computational physics , mechanics , magnetic energy , photosphere , astrophysics , atomic physics , magnetic field , optics , astronomy , magnetization , nuclear physics , materials science , quantum mechanics , metallurgy
We investigate the net effect of a multitude of thin magnetic tubes on the energy of ambient acoustic p modes. A p mode, when incident on a thin magnetic flux tube, excites magnetohydrodynamic (MHD) tube waves. These tube waves propagate vertically along the flux tube carrying away energy from the p ‐mode cavity resulting in the absorption of incident p ‐mode energy. We calculate the absorption arising from the excitation of sausage MHD waves within a collection of many non‐interacting magnetic flux tubes with differing plasma properties. We find that the shape and magnitude of the absorption, when compared with the observationally measured absorption, favours a model with a maximum‐flux boundary condition applied at the photosphere and a narrow distribution of plasma β in an ensemble with mean β value between 0.5 and 1.